Why family businesses are overlooking daughters

Over in the United States, Rupert Murdoch is fighting for his eldest son to have full control of the Murdoch empire. But the question of who will inherit the family business is also one that many Australians also face. And it's not an equal playing field.It's believed that only around 10% of daughters are getting the opportunity to take over family businesses. So why are daughters being overlooked and what sort of strain can that put on families?